v1.21.1 / 2025-03-04

bwplotka released this 04 Mar 14:29

· 170 commits to main since this release

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bwplotka Bartlomiej Plotka

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This release addresses a performance regression introduced in#1661 -- thanks to all whoreported this quickly:
@chlunde,@dethi,@aaronbee @tsuna @kakkoyun 💪🏽. This patch release also fixes the iOS build.

We will be hardening the release process even further (#1759,#1761) to prevent this in future, sorry for the inconvenience!

The high concurrency optimization is planned to be eventually reintroduced, however in a much safer manner, potentially in a separate API.

[BUGFIX] prometheus: Revert ofInc,Add andObserve cumulative metric CAS optimizations (#1661), causing regressions on low concurrency cases#1757
[BUGFIX] prometheus: Fix GOOS=ios build, broken due to process_collector_* wrong build tags.#1758

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